SUPER method uses femtosecond lasers for clean photons
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- Research team demonstrated the SUPER method for efficient single‑photon generation from tin‑vacancy centers in diamond, with results published in Nature Communications (2026).
- SUPER method employs two precisely tuned femtosecond laser pulses to excite SnV centers, enabling clean separation of control‑laser light from emitted single photons.
- Ultrafast laser pulses in the femtosecond regime provide the fastest optical control of diamond qubits reported, preserving the qubits' internal spin state for entanglement.
- Prof. Dr. Tim Schröder led the collaboration between Humboldt‑Universität zu Berlin and the Ferdinand‑Braun‑Institut, with co‑development by Prof. Doris Reiter and Dr. Thomas Bracht of TU Dortmund University.
- Nanofabrication of diamond nanostructures embedding SnV centers, combined with theoretical modeling, enabled the demonstration of the SUPER technique.
- Findings indicate that the SUPER method advances diamond quantum repeaters and distributed quantum computers toward practical application.
Why it matters: Quantum network developers gain a photon source that avoids lossy filtering and preserves spin coherence, a prerequisite for entangling distant nodes, moving diamond‑based repeaters and distributed quantum computers nearer to practical use. This progress narrows the gap between laboratory prototypes and field‑ready quantum communication hardware.
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